ABB RET 54 Series, Техническое справочное руководство, общее

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1MRS755225 Transformer Terminal
Technical Reference Manual, General
RET 54_
109
10.2. IEC_103 parameters
Adjustable IEC_103 serial communication parameters are shown in the table below.
1) Refer to Table 9.7.-1
2) 0 = Off; 1 = On
10.3. The general principle of application data mapping
The interface between the RET 54_ physical applications and the IEC 60870-5-103
application layer is done accordingly:
Alternative A
If a corresponding RET 54_ application signal is defined by the IEC 60870-5-103
standard, the alternative A is used.
Alternative B
Refer to Digitale Stationsleittechnik - Ergänzende Empfelungen zur Anwendung in
Verteilnetzstationen by Vereinigung Deutscher Elektrizitätswerke.
Alternative P
Private definitions are basically used because of two reasons:
1. The standard does not define the signal.
2. The signal is defined by the standard but the RET 54_ application signal
interface differs from this model.
10.4. Class 1 data buffering and priorities
The internal IEC 60870-5-103/Class 1 buffer inside the RET 54_ can store up to 50
spontaneous events. The interrogation events and the possible response messages,
that also are part of the class 1 data, do not occupy space in the buffer. The priority
of the different categories of the pending class 1 data is always so that the response
messages have the highest priority, thereafter the spontaneous events and finally the
interrogation events. The IEC_103 data cannot be filtered by using event masks.
Circuit breaker failure protection (CBFP) is represented with the information type
number 85 in the device function type.
The user cannot effect the event flow from the IEC 60870-5-103 protocol by
adjusting the event masks of the RET 54_ applications.
Parameter Value Default value Explanation
Unit address 1...254 1 IEC_103 station address
Baud rate 9600, 19200 9600 Communication speed
Function type 0...255 176 Unit function type
Scale factor 1.2 or 2.4 1.2 Analog value scale factor
Frame type 0...17
1)
1 Measurement frame type
RTD data frame
0 or 1
2) 0 If RTD data frame is on, then it is
send to every second class 2
data poll. Store and reset is
needed.